ext4_setent
ext4_setent(handle, &old, ino, file_type);
retval = ext4_setent(handle, &old, whiteout->i_ino,
retval = ext4_setent(handle, &new,
retval = ext4_setent(handle, &new, old.inode->i_ino, old.de->file_type);
retval = ext4_setent(handle, &old, new.inode->i_ino, new_file_type);